fix(VirtualInput): should not block of long press

[zombieJ]

长按后聚焦元素不在 root 上，关闭逻辑里加一个聚焦让它可以正确触发。

close #6474

PS: 测试中调用 blur 事件即便 activeElement 不在元素上也能触发，看起来测试中没有办法去模拟真实的场景。

[codecov[bot]]

Codecov Report

Attention: 3 lines in your changes are missing coverage. Please review.

Comparison is base (dcff0b8) 92.28% compared to head (eb11ebf) 92.24%.

Files	Patch %	Lines
src/components/number-keyboard/number-keyboard.tsx	0.00%	2 Missing :warning:
src/components/virtual-input/virtual-input.tsx	80.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #6477 +/- ## ========================================== - Coverage 92.28% 92.24% -0.04% ========================================== Files 316 316 Lines 6866 6872 +6 Branches 1720 1722 +2 ========================================== + Hits 6336 6339 +3 - Misses 494 497 +3 Partials 36 36 ```

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[github-actions[bot]]

PR preview has been successfully built and deployed to https://antd-mobile-preview-pr-6477.surge.sh

[github-actions[bot]]

Size Change: +90 B (0%)

Total Size: 367 kB

Filename	Size	Change
./lib/bundle/antd-mobile.compatible.umd.js	195 kB	+48 B (0%)
./lib/bundle/antd-mobile.umd.js	153 kB	+42 B (0%)

ℹ️ View Unchanged

| Filename | Size | | :--- | :---: | | `./lib/bundle/css-vars-patch.css` | 1.42 kB | | `./lib/bundle/style.css` | 18 kB |

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